Orthopaedic casting blank



FIG. 1 is a plan view of an orthopaedic casting blank, showing my new design;

FIG. 2 is a left side view thereof, with the right side view being the mirror image thereof;

FIG. 3 is a top end view thereof; and,

FIG. 4 is a bottom end view thereof. 

The ornamental design for an orthopaedic casting blank, as shown and described. 